package Basic;

public class HomeWork01 {
	public static void main(String[] args){
		int day = 1;
		double sum = 0;
		for (int i=0;i<day;i++){
			day++;
			if (day == 5 || day%5 == 0){
				sum -=6;
				continue;
			}
			sum +=2.5;
			if (sum == 100){
				break;
			}
		}
		System.out.println(day);
	}
}
